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High-pressure two-species mixing in turbulent free jets

Sharan, Nek and Bellan, Josette R. (2022) High-pressure two-species mixing in turbulent free jets. In: AIAA SCITECH 2022 Forum. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2022-0482. ISBN 978-1-62410-631-6.

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Engine performance and exhaust gas composition in numerous automotive/aerospace propulsion systems depends on the fuel-oxidizer mixing at high pressures. A fundamental understanding of the high-pressure (p) flow dynamics is hence key to improving the engine efficiency. Turbulent round jet direct numerical simulations are performed in this study at a Reynolds number (based on jet diameter and jet-exit velocity) of 5000 to understand binary-species mixing in supercritical conditions. For comparison, single-species flows at atmospheric as well as supercritical pressure are also investigated. The effects of species-concentration gradients on thermal and mass diffusion are significant in a binary-species flow. Moreover, large density (or thermodynamic) fluctuations can occur because of the differences in injected and chamber fluid density/temperature resulting in noticeable Soret effects. The paper discusses preliminary results from an investigation eventually aimed at examining multicomponent species injection and mixing.

Item Type:Book Section
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URLURL TypeDescription Presentation
Sharan, Nek0000-0002-7274-8232
Bellan, Josette R.0000-0001-9218-7017
Additional Information:© 2022 by California Institute of Technology. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
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Other Numbering System NameOther Numbering System ID
AIAA Paper2022-0482
Record Number:CaltechAUTHORS:20220210-928340000
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Official Citation:Nek Sharan and Josette R. Bellan. "High-pressure two-species mixing in turbulent free jets," AIAA 2022-0482. AIAA SCITECH 2022 Forum. January 2022.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113381
Deposited By: George Porter
Deposited On:10 Feb 2022 21:22
Last Modified:10 Feb 2022 22:09

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